Canon 3743B002 Basic Manual page 506

Select this to apply Image Adjustment to magazines.
Newspaper
Select this to apply Image Adjustment to newspapers.
Document
Select this to apply Image Adjustment to text documents.
Important
You can set Image Adjustment after preview.
You can set this setting when Recommended is selected on the Color Settings tab of the
Preferences dialog box.
Note
If the image is not adjusted properly with Auto, specify the document type.
The color tone may change from the source image due to the Image Adjustment. In that case, set
Image Adjustment to None.
Unsharp Mask
When this is set to ON, the outline of the subjects is emphasized to sharpen the image. This setting is
ON by default.
Descreen
Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenon where
uneven gradation or a stripe pattern appears when such photos or pictures printed with fine dots are
scanned. Descreen is the function for reducing this moire effect. This setting is OFF by default.
Note
Even if Descreen is set to ON, some moire effects may remain if Unsharp Mask is set to ON. In
that case, set Unsharp Mask to OFF.
Selecting Magazine(Color) in Select Source in Basic Mode tab has the same effect as setting
Descreen to ON in Advanced Mode tab.
Reduce Dust and Scratches
Scanned photos may contain white dots caused by dust or scratches. Use this function to reduce such
noise. This setting is None by default.
None
Dust and scratches will not be reduced.
Low
Select this to reduce small dust particles and scratches. Large ones may remain.
Medium
It is recommended that you normally select this setting.
High
Select this to reduce small/large dust particles and scratches. Evidence of the reduction process
may remain and may also remove delicate parts of the image.
Important
This function may not be effective for some types of photos.
Note
It is recommended that you select None when scanning printed materials.
Fading Correction
Use this function to correct photos that have faded with time or have a colorcast. Colorcast is a
phenomenon where a specific color affects the entire picture due to the weather or ambient strong
colors. This setting is None by default.
None